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HOM Papers from OFC 2015 Poten6ally Addressing BTI
Ali Ghiasi Ghiasi Quantum LLC
SMF Adhoc
April 28, 2015
List of relevant papers
q Single Channel 112 Gbit/s PAM4 at 56 Gbaud with Digital Signal Processing for Data Centers ApplicaHons
q PracHcal ImplementaHon of 100-‐Gbit/s/Lambda OpHcal Short-‐Reach Transceiver with Nyquist PAM4 Signaling using ElectroabsorpHve Modulated Laser (EML)
q Transmission of 56-‐Gb/s PAM-‐4 over 26-‐km Single Mode Fiber Using Maximum Likelihood Sequence EsHmaHon
q 112 Gb/s PAM4 Transmission Over 40 km SSMF Using 1.3 um Gain-‐Clamped Semiconductor OpHcal Amplifier
q Experimental DemonstraHon of 500 Gbit/s Short Reach Transmission Employing PAM4 Signal and Direct DetecHon with 25Gbps Device
q High-‐linearity Avalanche Photodiode for 40-‐km Transmission with 28-‐Gbaud PAM4 q 130-‐Gbps DMT Transmission using Silicon Mach-‐Zehnder Modulator with Chirp Control at 1.55-‐um q Four-‐Channel 100 Gb/s per Channel Discrete MulH-‐Tone ModulaHon Using Silicon Photonics
Integrated Circuits q 25GBaud PAM-‐4 Error Free Transmission over both Single Mode Fiber and MulHmode Fiber in a
QSFP form factor based on Silicon Photonics.
A. Ghiasi SMF Adhoc 2
Single Channel 112 Gbit/s PAM4 at 56 Gbaud with Digital Signal Processing for Data Centers Applica6ons
q Dan Sadot et. al. MulHphy, OFC 2015, Th2A.67 – Result similar to what has already presented to IEEE802.3bs with MSLE receiver
A. Ghiasi 3 SMF Adhoc
PracHcal ImplementaHon of 100-‐Gbit/s/Lambda OpHcal Short-‐Reach Transceiver with Nyquist PAM4 Signaling using
ElectroabsorpHve Modulated Laser (EML)
q Nobuhiko Kikuchi et. al. Hitachi, OFC 2015, Th3A.2 – Result similar to what has already presented to IEEE802.3bs – Sensi6vity is es6mated by assuming 1 error/symbol to be -‐8.5 dBm @1300 nm
at BER 2E-‐3 but no result to show absent of error floor.
A. Ghiasi 4 SMF Adhoc
Transmission of 56-‐Gb/s PAM-‐4 over 26-‐km Single Mode Fiber Using Maximum Likelihood Sequence Es6ma6on
q Chen Chen et. al., Huawei, OFC 2015 TH4A.5 – Show feasibility of 50 and 100 Gb/s PAM4 with MLSE and PD-‐LUT (non-‐linear decision) – 112 Gb/s PAM4 show persistent error floor similar to what we have seen in IEEE.
A. Ghiasi 5 SMF Adhoc
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112 Gb/s PAM4 Transmission Over 40 km SSMF Using 1.3 um Gain-‐Clamped Semiconductor Op6cal Amplifier�
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q Trevor Chan and Winston Way, NeoPhotonics, OFC 2015 TH3A.4 – Result similar to what Trevor and Winston have presented in IEEE error floor
persistent in case of 112 Gb/s PAM4 even with SOA front end.
A. Ghiasi 6 SMF Adhoc
SOA Gain ~12 dB For 0 dBm Clamp
Experimental Demonstra6on of 500 Gbit/s Short Reach Transmission Employing PAM4 Signal and Direct Detec6on with 25Gbps Device
q Kangping Zhong et. al. (Jiangwei Man Huawei LTD) , Hong Kong Polytechnic, OFC 2015, TH3A.3 – 128 Gb/s PAM 4 demonstrated with 7% FEC (3.8e-‐3) off line processing with MLSE – The classic error floor seen IEEE802.3bs with 100 Gb/s link also exist in this paper.
A. Ghiasi 7 SMF Adhoc
High-‐linearity Avalanche Photodiode for 40-‐km Transmission with 28-‐Gbaud PAM4
q Masahiro Nada et. al., NTT, OFC 2015, M3C.2 – Highly linear APD achieved a BER of 2.3e-‐4 achieved at -‐17.0 dBm – APD has BW of 21 GHz with gain of 10 dB
• APD had 2 dB compression at ~-‐3 dBm • According to Nada-‐san achieving 30 GHz BW with gain of 10 is not feasible with current technology
– APD supply 27 dB – Receive sensi6vity is in AOP, ER/OMA unknown due to test equipment
limita6on
A. Ghiasi 8 SMF Adhoc
Due to TIA SaturaHon
130-‐Gbps DMT Transmission using Silicon Mach-‐Zehnder Modulator with Chirp Control at 1.55-‐um
q Yutaka Kai et. al., Fujitsu LTD, OFC 2015, Th4A.1 – At KP4 FEC limit the 10 km link without Mux/de-‐mux has capacity of ~80 Gb/s – At KP4 FEC limit demonstrate feasibility 100 Gb/s 2 km PSM4
A. Ghiasi 9 SMF Adhoc
Four-‐Channel 100 Gb/s per Channel Discrete Mul6-‐Tone Modula6on Using Silicon Photonics Integrated Circuits
q Po Dong et. al. Bell Lab, OFC 2015 Post Deadline, TH5B.4 – At our FEC limit of 2.5e-‐4 only ~55 Gb/s supported through the channel!
A. Ghiasi 10 SMF Adhoc
25GBaud PAM-‐4 Error Free Transmission over both Single Mode Fiber and Mul6mode Fiber in a QSFP form factor based on Silicon Photonics
q M. Mazzini et. al., Cisco, OFC Post Deadline, TH5B.3 – At 50 Gb/s error floor of beier 1E-‐8 demonstrated
A. Ghiasi 11 SMF Adhoc
Summary q Many of us had high hope that we will see some breakthrough
results in regard to 100 Gb/s/lane HOM at OFC actually in IEEE we have seen updated results from – Mul6Phy -‐ MLSE – Hitachi -‐ Nyquist signaling – NeoPhotonics – 50/100G PAM4 – Fujitsu – DMT
q Two disHnct papers can address 50 Gb/s PAM4 BTI – NTT-‐ Highly linear 28 GBd APD
• Could address HOM link budget for higher loss and/or reach
– Cisco – 28 GBd PAM4 • Showing feasibility of 10 km reach 100G-‐LR2
q OFC 2015 does not address our current 100 Gb/s BTIs – Longer term poten6ally 28 GBd APD could provide sufficient gain-‐
bandwidth product for 100 Gb/s. A. Ghiasi 12 SMF Adhoc
